Color Usage

To use this palette in Inkscape:
1) In your .inkscape folder make another folder called palettes.
2) Put the oxygen.gpl file in that folder.
3) Restart Inkscape
4) Select the Oxygen palette in the Swatches dialog (Ctrl+Shift+W).

The Oxygen color palette is released under the Creative Commons Attribution-NonCommercial-NoDerivs 2.5 License.

Metaphors/Styles for different icon types

Actions

Action Icons have a distinct shadow (example and explanation needed)

Applications

Application icons vary the most in style from cartoonish logos to photo-realistic (example and explanation needed)

Mimetypes

Mimetypes all use the same paper sheet template (example and explanation needed)

Devices

Devices are the most realistic of all icons (example and explanation needed)

Filesystems

Filesystem icons vary in style depending on whether the subject at hand can be defined by a physical object (example and explanation needed)